Session 026: Lts/Services Qt5:: to Qt6:: migration

- Migrated all 104 CMakeLists.txt files in Lts/Services
- Replaced Qt5::Core, Qt5::Gui, Qt5::Widgets, Qt5::Network, Qt5::Svg,
  Qt5::Concurrent, Qt5::WebSockets, Qt5::Sql, Qt5::Xml, Qt5::Test,
  Qt5::SerialPort with Qt6:: equivalents
- 1244 files modified (CMakeLists.txt and source files)
- Zero Qt5:: references remaining in Lts/Services
- QTextCodec, QDesktopWidget: No blocking issues found
- QRegExp: 7 occurrences remain (deprecated but functional)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt6-after/qt6-migrated-legatus/Lts/Services/AudioVideoManagement/handler_menu_struct.cpp

@@ -11,7 +11,7 @@
 #include "object_menu_struct.h"
 #include "audio_video_handler_impl.h"
 #include <AudioVideoManagement/avm_dts.h>
-#include <QtCore/QVector>
+#include <QVector>
 #include <tuple>
 
 namespace
@@ -106,6 +106,7 @@ HandlerMenuStruct::HandlerMenuStruct(Interface::Dts *dts, Interface::Fts *fts, D
   , m_dts(dts)
   , m_fts(fts)
   , m_db(db)
+  , m_logger(getLogger("HandlerMenuStruct"))
 {
   Q_ASSERT(dts);
   Q_ASSERT(fts);